Olympus EPOCH 1000 Series, User Manual

Page: 247 / 364

910-269-EN, Rev. B, June 2011
Software Features and Options (Conventional UT Mode) 235
11.5.2 Gate Measurements and Alarms
The interface gate does not allow the same standard measurements as gate 1 and
gate 2. The interface gate only measures the thickness of a given indication, when
applicable.
Individual gate alarms can be set while interface gate is active. The negative threshold
alarm is most common when looking for interface echo drop-out. For more
information about setting up gate alarms, see chapter 6 on page 109.
11.6 Floating Gate
The EPOCH 1000 Series features a floating gate software option. This optional gate
function is used to track the peak echo amplitude at a specified gain level below that
amplitude (-1 dB to –14 dB in 1 dB increments). The floating gate option provides a
more consistent and accurate thickness reading, particularly when using edge-
detection mode. In edge-detection mode, the floating gate tracks the highest
amplitude echo breaking the gate, but reports a measurement reading from the first
leading edge to break the gate threshold. If the indication height fluctuates, floating
gate tracks this fluctuation to provide more consistent measurements from the same
point along the indication’s leading edge.
11.6.1 Option Activation
To activate the floating gate option, open the FGate setup page by choosing 3/6 >
General Option > Floating Gate . The floating gate setup page allows you to adjust
the following parameters:
G1 Float
Activate/Deactivate the floating gate feature for gate 1.
Level
Level (in dB) at which the gate tracks below the peak amplitude of the gated
indication (gate 1).
G2 Float
Activate/Deactivate the floating gate feature for gate 2.
Level
Level (in dB) at which the gate tracks below the peak amplitude of the gated
indication (gate 2).
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